Detachable bone drill for centrum forming

Abstract

The utility model discloses a detachable bone drill for centrum forming. The detachable bone drill comprises a handle, a drill rod and a limiting piece. Wherein the handle is provided with a mounting groove, the handle is further provided with a first limiting hole, and the first limiting hole is communicated with the mounting groove; the drill rod comprises a drill bit, a drill rod main body and a fixing part which are integrally connected, the drill bit is used for cone drilling, the fixing part is detachably mounted in the mounting groove and provided with a limiting structure, the limiting structure is used for limiting rotation of the fixing part relative to the handle, and the limiting piece is detachably mounted in the first limiting hole; the limiting piece is used for limiting the fixing part to move in the first direction relative to the handle. According to the detachable bone drill for centrum forming, the handle and the drill rod can be conveniently assembled and disassembled, only the drill rod needs to be scrapped, and the handle can be repeatedly used, so that the difficulty of a scrap treatment process and the cost of scrap treatment are reduced, and the production cost is saved; rotation or movement of the drill rod is limited through the limiting structure and the limiting piece, and therefore the cone drilling effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a detachable bone drill for vertebral body shaping. Background Technology

[0002] Vertebroplasty, also known as percutaneous vertebroplasty or percutaneous kyphoplasty, is a minimally invasive surgical procedure. Specifically, vertebroplasty involves injecting bone cement (polymethyl methacrylate) or artificial bone into the diseased vertebral body to strengthen it. During vertebroplasty, a channel is typically created within the diseased vertebral body using a bone drill and a corresponding dilator cannula. Bone cement is then injected directly into the channel, or a vertebral dilation balloon catheter is used to dilate the vertebra before injecting bone cement.

[0003] Vertebroplasty tools are single-use sterile products and must be disposed of in accordance with the "Regulations on the Management of Medical Waste" after use. An existing type of one-piece injection-molded bone drill consists of a drill rod and a plastic handle at the end of the drill rod, with the drill rod and plastic handle integrally injection-molded. Therefore, the entire bone drill needs to be disposed of upon disposal, resulting in high disposal costs, especially given the complex processing of the injection-molded handle; furthermore, disposing of the entire bone drill also increases the cost of vertebroplasty. Utility Model Content

[0004] The purpose of this utility model is to provide a detachable bone drill for vertebral body shaping, in order to solve the problem that the existing one-piece injection molded bone drill requires the plastic handle and drill rod to be scrapped together, which leads to a complicated scrapping process and high scrapping cost, and the overall scrapping process leads to high production cost.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A detachable bone drill for vertebral body shaping, comprising:

[0007] The handle is provided with a mounting groove that opens in a first direction, and the handle is also provided with a first limiting hole that opens in a second direction. The first limiting hole is connected to the mounting groove, and the first direction is perpendicular to the second direction.

[0008] The drill rod and the limiting component are arranged along the first direction. The drill rod includes an integrally connected drill bit, a drill rod body, and a fixing part. The drill bit is used for drilling a cone-shaped hole. The fixing part is detachably installed in the mounting groove and is provided with a limiting structure. The limiting structure is used to restrict the rotation of the fixing part relative to the handle. After the fixing part is installed in the mounting groove, the limiting component is detachably installed in the first limiting hole. The limiting component is used to restrict the movement of the fixing part relative to the handle along the first direction.

[0009] As a preferred embodiment of the above-mentioned detachable bone drill for vertebral body shaping, the opening of the mounting groove is provided at the end of the handle away from the drill bit along the first direction, and the end of the handle near the drill bit along the first direction is provided with a first connecting hole, which is connected to the bottom wall of the mounting groove.

[0010] The detachable bone drill for vertebral shaping also includes an insert and a locking knob. Along the first direction, the insert includes a main body and a connecting part connected together. The main body is inserted into the mounting groove and has a mounting hole. The fixing part is detachably connected to the mounting hole. The drill rod body passes through the first communicating hole. The main body also has a second limiting hole extending along the second direction. After the main body is inserted into the mounting groove, the second limiting hole aligns with the first limiting hole. The limiting member restricts the movement of the main body relative to the mounting groove through the first limiting hole and the second limiting hole. The connecting part is located at the end of the main body away from the drill bit. The connecting part is threadedly connected to the locking knob. The locking knob can also abut against the fixing part to restrict the movement of the fixing part relative to the handle along the first direction.

[0011] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, the outer periphery of the fixing part is provided with a first external thread, the first external thread is the limiting structure, the mounting hole is a threaded hole, and the fixing part and the main body are threadedly connected through the first external thread and the threaded hole.

[0012] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, a plurality of pins are spaced apart on the outer periphery of the fixing part along the circumferential direction of the fixing part. The plurality of pins form the limiting structure. The mounting hole is a polygonal pin hole. The fixing part is inserted into the polygonal pin hole. The plurality of pins cooperate with the polygonal pin hole to restrict the rotation of the fixing part relative to the main body.

[0013] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, the connecting part is provided with an abutment hole extending along the first direction, the abutment hole is connected to the mounting hole, the locking knob is provided with a threaded groove, the outer periphery of the connecting part is provided with a second external thread, and the connecting part and the locking knob are threadedly connected through the second external thread and the threaded groove.

[0014] The locking knob is also provided with an abutment post. Along the first direction, the abutment post extends from the bottom wall of the threaded groove to the opening of the threaded groove. After the connecting part is connected to the locking knob, the abutment post passes through the abutment hole and abuts against the fixing part.

[0015] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, the main body is provided with a plug-in portion at one end away from the connecting portion along the first direction. The plug-in portion is plugged into the first connecting hole. Along the first direction, the projected shape of the plug-in portion and the projected shape of the first connecting hole are both polygonal. Along the first direction, the plug-in portion is provided with a second connecting hole that communicates with the mounting hole. The drill rod body passes through the second connecting hole.

[0016] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, the fixing part consists of a polygonal pin integrally formed with the drill rod body and a sleeve. The sleeve is fitted onto the polygonal pin and welded to it for fixation. The sleeve is provided with the limiting structure.

[0017] As a preferred embodiment of the above-mentioned detachable bone drill for vertebral body shaping, the opening of the mounting groove is located at one end of the handle near the drill bit along the first direction. Along the first direction, the fixing part includes a fixed end and a displacement-stopping end connected to each other. The projected shape of the fixed end is polygonal, and the projected shape of the displacement-stopping end is circular. The mounting groove includes a polygonal groove that matches the fixed end and a circular groove that matches the displacement-stopping end. The polygonal fixed end is the limiting structure.

[0018] Along the circumference of the stop end, a groove is formed on the outer periphery of the stop end, and a steel ball is movably disposed in the first limiting hole. After the limiting member is installed in the first limiting hole, one end of the limiting member abuts against the steel ball, and the steel ball can be partially embedded in the groove.

[0019] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, a spring is further provided between the limiting member and the steel ball, with one end of the spring abutting against one end of the limiting member and the other end of the spring abutting against the steel ball.

[0020] As a preferred embodiment of the aforementioned detachable bone drill for vertebral body shaping, the limiting member is a screw, and the inner peripheral wall of the first limiting hole is at least partially provided with internal threads.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model provides a detachable bone drill for vertebral body shaping, including a handle, a drill rod, and a limiting member. The handle has a mounting groove opening in a first direction and a first limiting hole opening in a second direction, which communicates with the mounting groove. The first direction is perpendicular to the second direction. Along the first direction, the drill rod includes an integrally connected drill bit, a drill rod body, and a fixing part. The drill bit is used for drilling into the vertebral body. The fixing part is detachably installed in the mounting groove and has a limiting structure to restrict rotation of the fixing part relative to the handle. After the fixing part is installed in the mounting groove, the limiting member is detachably installed in the first limiting hole to restrict movement of the fixing part relative to the handle along the first direction. During installation, the fixing part of the drill rod is installed in the mounting groove, and after the fixing part is installed, the limiting member is installed in the first limiting hole. During use, the user holds the handle and rotates it clockwise or counterclockwise, causing the drill bit on the drill rod to rotate and drill a hole in the vertebral body. During drilling, the fixed part is restricted by the limiting structure, preventing it from rotating relative to the handle. The limiting component restricts the fixed part, preventing it from moving due to force in the first direction, thus ensuring the effectiveness of the vertebral body drilling with this detachable bone drill for vertebral shaping. After drilling the vertebral body, the limiting component is detached from the first limiting hole, and then the fixed part of the drill rod is removed from the mounting slot. The handle and limiting component can be reused after disinfection, while the drill rod is disposed of after being rendered harmless.

[0023] Compared to existing injection-molded bone drills, this detachable bone drill for vertebral body forming features a detachable handle and drill rod, allowing for easy assembly and disassembly. Only the drill rod needs to be scrapped, while the handle can be reused, thus reducing the difficulty and cost of the scrapping process and saving production costs. In addition, the limiting structure and limiting components restrict the rotation or movement of the drill rod, thereby ensuring the effectiveness of vertebral body drilling. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a detachable bone drill for vertebral body shaping provided in Embodiment 1 of this utility model;

[0025] Figure 2 This is a partial cross-sectional schematic diagram of a detachable bone drill for vertebral body shaping provided in Embodiment 1 of this utility model;

[0026] Figure 3 This is a partial cross-sectional view of the handle of a detachable bone drill for vertebral shaping, provided in Embodiment 1 of this utility model. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the drill rod of a detachable bone drill for vertebral shaping provided in Embodiment 1 of this utility model;

[0028] Figure 5 This is a cross-sectional schematic diagram of a detachable bone drill insert for vertebral body shaping provided in Embodiment 1 of this utility model.

[0029] Figure 6 This is a cross-sectional schematic diagram of the locking knob of a detachable bone drill for vertebral shaping provided in Embodiment 1 of this utility model.

[0030] Figure 7 This is a schematic diagram of the structure of a detachable bone drill insert for vertebral body shaping provided in Embodiment 1 of this utility model;

[0031] Figure 8 This is a partial cross-sectional view of the handle of a detachable bone drill for vertebral shaping, provided in Embodiment 1 of this utility model. Figure 2 ;

[0032] Figure 9 This is a schematic diagram of the structure of a detachable bone drill sleeve for vertebral body shaping provided in Embodiment 1 of this utility model;

[0033] Figure 10 This is a schematic diagram of the structure of a detachable bone drill for vertebral body shaping provided in Embodiment 2 of this utility model;

[0034] Figure 11 This is a partial cross-sectional view of the handle of a detachable bone drill for vertebral shaping, provided in Embodiment 2 of this utility model. Figure 1 ;

[0035] Figure 12 This is a schematic diagram of the drill rod of a detachable bone drill for vertebral shaping provided in Embodiment 2 of this utility model;

[0036] Figure 13 This is a partial cross-sectional view of the handle of a detachable bone drill for vertebral shaping, provided in Embodiment 2 of this utility model. Figure 2 ;

[0037] Figure 14 This is a partial cross-sectional schematic diagram of a detachable bone drill for vertebral body shaping provided in Embodiment 2 of this utility model.

[0038] In the picture:

[0039] 1. Handle; 11. Mounting slot; 111. Polygonal slot; 112. Circular slot; 12. First limiting hole; 121. Threaded part; 122. Steel ball mounting part; 13. First connecting hole; 14. Clearance slot; 15. Weight reduction slot;

[0040] 2. Drill rod; 21. Drill bit; 22. Drill rod body; 23. Fixing part; 231. Polygonal pin; 232. Sleeve; 2321. Sleeve hole; 233. Anti-rotation end; 234. Anti-displacement end; 2341. Groove;

[0041] 3. Limiting components;

[0042] 4. Insert; 41. Main body; 411. Mounting hole; 412. Second limiting hole; 42. Connecting part; 421. Abutting hole; 43. Insertion part; 431. Second connecting hole;

[0043] 5. Locking knob; 51. Threaded groove; 52. Abutment post;

[0044] 6. Steel balls;

[0045] 7. Spring. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0051] Example 1

[0052] like Figures 1 to 9 As shown in the figure, Embodiment 1 of this utility model provides a detachable bone drill for vertebral shaping, which includes a handle 1, a drill rod 2 and a limiting member 3.

[0053] Specifically, such as Figures 1 to 4 As shown, the handle 1 is provided with a mounting groove 11 that opens in a first direction. The handle 1 is also provided with a first limiting hole 12 that opens in a second direction. The first limiting hole 12 is connected to the mounting groove 11. The first direction is perpendicular to the second direction. Along the first direction, the drill rod 2 includes an integrally connected drill bit 21, a drill rod body 22, and a fixing part 23. The drill bit 21 is used for drilling a cone-shaped hole. The fixing part 23 is detachably installed in the mounting groove 11. The fixing part 23 is provided with a limiting structure. The limiting structure is used to restrict the rotation of the fixing part 23 relative to the handle 1. After the fixing part 23 is installed in the mounting groove 11, the limiting member 3 is detachably installed in the first limiting hole 12. The limiting member 3 is used to restrict the movement of the fixing part 23 relative to the handle 1 in the first direction.

[0054] During installation, such as Figures 1 to 4As shown, the fixing part 23 of the drill rod 2 is installed in the mounting groove 11. After the fixing part 23 is installed in place, the limiting member 3 is installed in the first limiting hole 12. During use, the user holds the handle 1 and rotates the handle 1 clockwise or counterclockwise, thereby causing the drill bit 21 of the drill rod 2 to rotate and drill the vertebral body. During the drilling process, the fixing part 23 is restricted by the limiting structure, so the fixing part 23 will not rotate relative to the handle 1. The limiting member 3 restricts the fixing part 23, preventing it from moving due to force along the first direction, thus ensuring the effectiveness of the vertebral body drilling of the detachable bone drill for vertebral body shaping. After the vertebral body drilling is completed, the limiting member 3 is removed from the first limiting hole 12, and then the fixing part 23 of the drill rod 2 is removed from the mounting groove 11. The handle 1 and the limiting member 3 can be reused after disinfection, while the drill rod 2 is disposed of after being rendered harmless.

[0055] Compared to existing injection-molded bone drills, this detachable bone drill for vertebral body forming makes the handle 1 and drill rod 2 detachable, which can be easily assembled and disassembled. Only the drill rod 2 needs to be scrapped, while the handle 1 can be reused, thereby reducing the difficulty and cost of scrapping process and saving production costs. In addition, the rotation or movement of the drill rod 2 is restricted by the limiting structure and limiting part 3, thereby ensuring the effect of drilling the vertebral body.

[0056] For example, taking the width direction of the handle 1 or the length direction of the drill rod 2 as the first direction, and the thickness direction of the handle 1 as the second direction.

[0057] More specifically, such as Figures 1 to 6 As shown in the figure, in this embodiment, the opening of the mounting groove 11 is located at the end of the handle 1 away from the drill bit 21 along the first direction, and the end of the handle 1 near the drill bit 21 along the first direction is provided with a first connecting hole 13, which is connected to the bottom wall of the mounting groove 11; the detachable bone drill for vertebral shaping also includes an insert 4 and a locking knob 5. Along the first direction, the insert 4 includes a main body 41 and a connecting part 42 connected together. The main body 41 is inserted into the mounting groove 11, and the main body 41 has a mounting hole 411. The fixing part 23 is detachably connected to the mounting hole 411. The drill rod main body The body 22 passes through the first connecting hole 13, and the main body 41 also has a second limiting hole 412 extending in the second direction. After the main body 41 is inserted into the mounting groove 11, the second limiting hole 412 is aligned with the first limiting hole 12. The limiting member 3 restricts the movement of the main body 41 relative to the mounting groove 11 through the first limiting hole 12 and the second limiting hole 412. The connecting part 42 is provided at the end of the main body 41 away from the drill bit 21. The connecting part 42 is threadedly connected to the locking knob 5. The locking knob 5 can also abut against the fixing part 23 to restrict the movement of the fixing part 23 relative to the handle 1 in the first direction.

[0058] In detail, such as Figures 1 to 6 As shown, during installation, the fixing part 23 of the drill rod 2 is first installed into the mounting hole 411 of the main body 41 of the insert 4. The drill bit 21 of the drill rod 2 is inserted into one end of the mounting groove 11 in the first direction. The drill bit 21 passes through the mounting groove 11 and the first connecting hole 13 in sequence. After the main body 41 of the insert 4 is inserted into the mounting groove 11, the locking knob 5 is threadedly connected to the connecting part 42 of the insert 4, so that the locking knob 5 can lock the fixing part 23 of the drill rod 2 in the first direction. Finally, the limiting member 3 is connected to the first limiting hole 12 and the second limiting hole 412 in sequence, thereby restricting the movement of the insert 4 in the first direction and ensuring the fixing effect of the drill rod 2.

[0059] Preferably, such as Figure 2 , Figure 3 and Figure 5 As shown, the opening size of the first connecting hole 13 is smaller than the opening size of the mounting groove 11, so that the main body 41 of the insert 4 can abut against the bottom wall of the mounting groove 11, thereby restricting the movement of the main body 41 of the insert 4 towards one end of the drill bit 21 in the first direction and also improving the installation speed of the insert 4.

[0060] Preferably, the outer periphery of the fixing part 23 is provided with a first external thread, which is a limiting structure. The mounting hole 411 is a threaded hole, and the fixing part 23 of the drill rod 2 and the main body part 41 of the insert 4 are threadedly connected through the first external thread and the threaded hole. This arrangement can prevent the fixing part 23 of the drill rod 2 from rotating relative to the mounting hole 411, and ensure the connection and fixation effect between the fixing part 23 of the drill rod 2 and the main body part 41 of the insert 4.

[0061] As an alternative, multiple pins are spaced apart along the circumference of the fixing part 23, forming a limiting structure. The mounting hole 411 is a polygonal pin hole, into which the fixing part 23 is inserted. The multiple pins cooperate with the polygonal pin hole to restrict the rotation of the fixing part 23 relative to the main body 41. Specifically, the fixing part 23 may have four, five, or six pins, etc., and correspondingly, the polygonal pin hole may be a square, pentagonal, or hexagonal pin hole. This arrangement also prevents the fixing part 23 of the drill rod 2 from rotating relative to the mounting hole 411. Furthermore, the fixing part 23 and the polygonal pin hole are interference-fitted, thereby further ensuring the fixing effect between the fixing part 23 and the polygonal pin hole.

[0062] Specifically, such as Figures 2 to 6As shown, the connecting part 42 has an abutment hole 421 extending in the first direction, which communicates with the mounting hole 411. The locking knob 5 is provided with a threaded groove 51, and the outer periphery of the connecting part 42 is provided with a second external thread. The connecting part 42 and the locking knob 5 are threadedly connected through the second external thread and the threaded groove 51. By setting the locking knob 5 and the connecting part 42 to be threadedly connected, the connection and fixing effect between the locking knob 5 and the connecting part 42 can be guaranteed, so as to better restrict the setting position of the fixing part 23 of the drill rod 2. The locking knob 5 is also provided with an abutment post 52. In the first direction, the abutment post 52 extends from the bottom wall of the threaded groove 51 to the opening of the threaded groove 51. After the connecting part 42 and the locking knob 5 are connected in place, the abutment post 52 passes through the abutment hole 421 and abuts against the fixing part 23.

[0063] More specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, the first external thread on the outer periphery of the fixing part 23 is a left-hand thread, and the threaded groove 51 of the locking knob 5 is also a left-hand helix, but the pitch of the first external thread and the pitch of the threaded groove 51 are different. When drilling the vertebral body, the drill rod 2 is generally rotated clockwise, thus tending to tighten the fixing part 23 and the locking knob 5, preventing the drill rod 2 from loosening. During the drilling process, to prevent bone fragments from accumulating and affecting the drilling, after rotating clockwise for a certain period, it will be rotated counterclockwise by half a turn. Therefore, setting the pitch of the first external thread and the threaded groove 51 to be different creates a displacement difference between them, thereby achieving the purpose of locking the fixing part 23 of the drill rod 2 and preventing the drill rod 2 from loosening. Preferably, the pitch of the first external thread is greater than the pitch of the threaded groove 51.

[0064] Optionally, such as Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the main body 41 of the insert 4 has a plug-in portion 43 at one end away from the connecting portion 42 along the first direction. The plug-in portion 43 is plugged into the first connecting hole 13. Along the first direction, the projected shape of both the plug-in portion 43 and the first connecting hole 13 are polygonal. Along the first direction, the plug-in portion 43 has a second connecting hole 431 that communicates with the mounting hole 411. The drill rod body 22 passes through the second connecting hole 431. By making both the plug-in portion 43 and the first connecting hole 13 polygonal, it is possible to further prevent the insert 4 from rotating relative to the handle 1, ensuring the fixation effect of the drill rod 2. Further optionally, the projected shape of the plug-in portion 43 and the projected shape of the first connecting hole 13 can be quadrilateral, pentagonal, or hexagonal, etc.

[0065] Optionally, such as Figure 4 and Figure 9As shown in the diagram, in this embodiment, the fixing part 23 consists of a polygonal pin 231 integrally formed with the drill pipe body 22 and a sleeve 232. The sleeve 232 is fitted onto the polygonal pin 231 and welded to it. The sleeve 232 has a limiting structure. Specifically, the sleeve 232 has a socket hole 2321, which is a polygonal hole that matches the polygonal pin 231. The polygonal pin 231 is inserted into the socket hole 2321 and welded to it after insertion. By making the socket hole 2321 a polygonal hole, rotation of the drill pipe body 22 relative to the sleeve 232 can be prevented. Specifically, in this embodiment, the polygonal pin 231 is a square pin, and the polygonal hole is a square hole. By welding the sleeve 232 to fix it, the structural strength of the fixing part 23 can be ensured. Furthermore, argon arc welding or laser welding is used to weld and fix the sleeve 232. Optionally, the outer periphery of the sleeve 232 is provided with a first external thread or multiple pin ribs. This configuration can reduce the manufacturing difficulty of integrally forming the drill pipe 2.

[0066] Of course, in other embodiments, the fixing part 23, the drill rod body 22 and the drill bit 21 can be an integrally formed structure.

[0067] Specifically, such as Figures 1 to 3 As shown, the limiting member 3 is a screw, and the inner peripheral wall of the first limiting hole 12 is at least partially provided with internal threads. Further, in this embodiment, both the first limiting hole 12 and the second limiting hole 412 are threaded holes, and two of each are provided. The two first limiting holes 12 are spaced apart along the length of the handle 1, and correspondingly, the two second limiting holes 412 are spaced apart on the main body 41 of the insert 4, with two screws provided. Of course, in other embodiments, three or four first limiting holes 12 and second limiting holes 412 may be provided, etc.

[0068] Of course, in other embodiments, the limiting member 3 can also be a pin, and correspondingly, the first limiting hole 12 and the second limiting hole 412 are both pin holes.

[0069] Preferably, such as Figures 1 to 4 As shown in the diagram, in this embodiment, the handle 1 is also provided with a clearance groove 14, which is connected to the mounting groove 11. When the locking knob 5 is tightened into place, the locking knob 5 can be completely inserted into the clearance groove 14. This design allows the locking knob 5 to be concealed within the clearance groove 14, thus preventing the locking knob 5 from contacting the palm when turning the handle 1, which would prevent the hand from fully exerting force. It also prevents the locking knob 5 from loosening due to accidental contact, which would affect the contact effect with the fixing part 23 of the drill rod 2. Furthermore, placing the locking knob 5 within the clearance groove 14 also enhances the aesthetics of this detachable bone drill.

[0070] Preferably, a position scale line is provided on the outside of the drill rod body 22 along the first direction. The position scale line allows for clear knowledge of the current drilling depth of the drill bit 21, thereby improving the efficiency of cone drilling.

[0071] Optionally, the outer periphery of the locking knob 5 is provided with a knurled structure. By providing a knurled structure, the frictional resistance between the user's fingers and the locking knob can be increased, thereby preventing the user from slipping when turning the locking knob 5, thus making it convenient and quick to turn the locking knob 5.

[0072] Preferably, both the drill rod 2 and the sleeve 232 are made of stainless steel to ensure the structural strength of the drill rod 2 and prevent deformation or breakage during the drilling of the vertebral body. Preferably, the handle 1 is made of aluminum alloy or other lightweight metals to reduce the overall weight of the detachable bone drill for vertebral body shaping and meet the requirements of lightweighting. In addition, since aluminum alloy is less hard than stainless steel, repeated use will cause wear on the mounting hole 411 of the insert 4. Therefore, it is preferable that the insert 4 is made of stainless steel.

[0073] Optionally, such as Figures 1 to 3 As shown, a weight-reducing groove 15 is also provided on the outer periphery of the handle 1 along the second direction. This design, while ensuring the structural strength of the handle 1, can further reduce the overall weight of the detachable bone drill for vertebral shaping, meeting the requirements of lightweighting, and also effectively saving production costs.

[0074] Example 2

[0075] To avoid redundancy, this embodiment only introduces the technical features that differ from Embodiment 1.

[0076] Specifically, such as Figures 10 to 14 As shown in the figure, in this embodiment, the opening of the mounting groove 11 is located at one end of the handle 1 near the drill bit 21 along the first direction. Along the first direction, the fixing part 23 includes a fixed end 233 and a fixed end 234 connected to each other. The projected shape of the fixed end 233 is polygonal, and the projected shape of the fixed end 234 is circular. The mounting groove 11 includes a polygonal groove 111 that matches the fixed end 233 and a circular groove 112 that matches the fixed end 234. The polygonal fixed end 233 is a limiting structure. Along the circumference of the fixed end 234, a groove 2341 is provided on the outer periphery of the fixed end 234. A steel ball 6 is movably disposed in the first limiting hole 12. After the limiting member 3 is installed in place with the first limiting hole 12, one end of the limiting member 3 abuts against the steel ball 6, and the steel ball 6 can be partially embedded in the groove 2341.

[0077] In detail, such as Figures 10 to 14As shown, during installation, the anti-rotation end 233 of the fixing part 23 is inserted into the polygonal groove 111 after passing through the circular groove 112. The polygonal anti-rotation end 233 can cooperate with the polygonal groove 111 to prevent the fixing part 23 from rotating relative to the mounting groove 11, thus ensuring the cone-shaped drilling effect of the drill rod 2. After the anti-rotation end 233 is inserted into place, a steel ball 6 is placed in the first limiting hole 12 and a limiting member 3 is installed, so that one end of the limiting member 3 abuts against the steel ball 6 and partially presses the steel ball 6 against the groove 2341 of the anti-rotation end 234, thereby preventing the fixing part 23 from sliding relative to the mounting groove 11 in the first direction and ensuring the cone-shaped drilling effect of the drill rod 2.

[0078] Specifically, such as Figure 13 and Figure 14 As shown, the first limiting member 3 is a screw, and the first limiting hole 12 includes a threaded portion 121 and a steel ball 6 mounting portion 122. The threaded portion 121 is used for threaded connection with the screw, and the steel ball 6 mounting portion 122 is used for mounting the steel ball 6. The opening size of the steel ball 6 mounting portion 122 near the mounting groove 11 is smaller than the diameter of the steel ball 6, so that the steel ball 6 will not detach from the steel ball 6 mounting portion 122 and can be partially embedded in the groove 2341.

[0079] Preferably, such as Figure 12 and Figure 14 As shown, a spring 7 is also provided between the limiting member 3 and the steel ball 6. One end of the spring 7 abuts against one end of the limiting member 3, and the other end of the spring 7 abuts against the steel ball 6. Specifically, after the limiting member 3 is installed in place, it can compress the spring 7, and the elastic restoring force of the spring 7 can press the steel ball 6 tightly against the groove 2341. By setting the spring 7, the limiting member 3 and the steel ball 6 are in elastic contact, so that the outer surface of the steel ball 6 can fit more tightly against the inner surface of the groove 2341, ensuring the limiting effect on the fixing part 23.

[0080] In detail, such as Figure 13 and Figure 14 As shown in the figure, in this embodiment, there are two first limiting holes 12. Along the second direction, the two first limiting holes 12 are symmetrically distributed at both ends of the mounting groove 11, and there are two limiting members 3.

[0081] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A detachable bone drill for vertebral body shaping, characterized in that, include: Handle (1), the handle (1) is provided with a mounting groove (11) opening in a first direction, the handle (1) is also provided with a first limiting hole (12) in a second direction, the first limiting hole (12) is connected to the mounting groove (11), and the first direction is perpendicular to the second direction; The drill rod (2) and the limiting member (3) are arranged along the first direction. The drill rod (2) includes an integrally connected drill bit (21), a drill rod body (22), and a fixing part (23). The drill bit (21) is used for drilling a cone-shaped hole. The fixing part (23) is detachably installed in the mounting groove (11). The fixing part (23) is provided with a limiting structure. The limiting structure is used to restrict the rotation of the fixing part (23) relative to the handle (1). After the fixing part (23) is installed in the mounting groove (11), the limiting member (3) is detachably installed in the first limiting hole (12). The limiting member (3) is used to restrict the movement of the fixing part (23) relative to the handle (1) along the first direction.

2. The detachable bone drill for vertebral body shaping according to claim 1, characterized in that, The opening of the mounting groove (11) is located at one end of the handle (1) away from the drill bit (21) along the first direction. A first connecting hole (13) is provided at one end of the handle (1) close to the drill bit (21) along the first direction. The first connecting hole (13) is connected to the bottom wall of the mounting groove (11). The detachable bone drill for vertebral shaping also includes an insert (4) and a locking knob (5). Along the first direction, the insert (4) includes a main body (41) and a connecting part (42) connected together. The main body (41) is inserted into the mounting groove (11). The main body (41) has a mounting hole (411). The fixing part (23) is detachably connected to the mounting hole (411). The drill rod body (22) passes through the first connecting hole (13). The main body (41) also has a second limiting hole (412) extending along the second direction. The main body (41) and the mounting groove (11) After insertion, the second limiting hole (412) is aligned with the first limiting hole (12). The limiting member (3) restricts the movement of the main body (41) relative to the mounting groove (11) through the first limiting hole (12) and the second limiting hole (412). The connecting part (42) is located at the end of the main body (41) away from the drill bit (21). The connecting part (42) is threadedly connected to the locking knob (5). The locking knob (5) can also abut against the fixing part (23) to restrict the fixing part (23) from moving relative to the handle (1) in the first direction.

3. The detachable bone drill for vertebral body shaping according to claim 2, characterized in that, The outer periphery of the fixing part (23) is provided with a first external thread, the first external thread is the limiting structure, the mounting hole (411) is a threaded hole, and the fixing part (23) and the main body part (41) are threadedly connected through the first external thread and the threaded hole.

4. A detachable bone drill for vertebral body shaping according to claim 2, characterized in that, Along the circumference of the fixing part (23), a plurality of pins are provided at intervals on the outer periphery of the fixing part (23), and the plurality of pins form the limiting structure. The mounting hole (411) is a polygonal pin hole, and the fixing part (23) is inserted into the polygonal pin hole. The plurality of pins cooperate with the polygonal pin hole to restrict the fixing part (23) from rotating relative to the main body part (41).

5. A detachable bone drill for vertebral body shaping according to any one of claims 2-4, characterized in that, The connecting part (42) has an abutment hole (421) extending along the first direction. The abutment hole (421) is connected to the mounting hole (411). The locking knob (5) is provided with a threaded groove (51). The outer periphery of the connecting part (42) is provided with a second external thread. The connecting part (42) and the locking knob (5) are threadedly connected through the second external thread and the threaded groove (51). The locking knob (5) is also provided with an abutment post (52). Along the first direction, the abutment post (52) extends from the bottom wall of the threaded groove (51) to the opening of the threaded groove (51). After the connecting part (42) is connected to the locking knob (5) in place, the abutment post (52) passes through the abutment hole (421) and abuts against the fixing part (23).

6. A detachable bone drill for vertebral body shaping according to claim 5, characterized in that, The main body (41) is provided with a plug-in part (43) at one end away from the connecting part (42) along the first direction. The plug-in part (43) is plugged into the first connecting hole (13). Along the first direction, the projected shape of the plug-in part (43) and the projected shape of the first connecting hole (13) are both polygonal. Along the first direction, the plug-in part (43) is provided with a second connecting hole (431) that communicates with the mounting hole (411). The drill rod body (22) passes through the second connecting hole (431).

7. A detachable bone drill for vertebral body shaping according to claim 5, characterized in that, The fixing part (23) consists of a polygonal pin (231) integrally formed with the drill rod body (22) and a sleeve (232). The sleeve (232) is sleeved on the polygonal pin (231) and welded to the polygonal pin (231). The sleeve (232) is provided with the limiting structure.

8. A detachable bone drill for vertebral body shaping according to claim 1, characterized in that, The opening of the mounting groove (11) is located at one end of the handle (1) near the drill bit (21) along the first direction. Along the first direction, the fixing part (23) includes a fixed end (233) and a fixed end (234) connected to each other. The projected shape of the fixed end (233) is polygonal, and the projected shape of the fixed end (234) is circular. The mounting groove (11) includes a polygonal groove (111) that matches the fixed end (233) and a circular groove (112) that matches the fixed end (234). The polygonal fixed end (233) is the limiting structure. Along the circumference of the stop end (234), a groove (2341) is provided on the outer periphery of the stop end (234). A steel ball (6) is movably disposed in the first limiting hole (12). After the limiting member (3) is installed in the first limiting hole (12), one end of the limiting member (3) abuts against the steel ball (6), and the steel ball (6) can be partially embedded in the groove (2341).

9. A detachable bone drill for vertebral body shaping according to claim 8, characterized in that, A spring (7) is also provided between the limiting member (3) and the steel ball (6), with one end of the spring (7) abutting against one end of the limiting member (3) and the other end of the spring (7) abutting against the steel ball (6).

10. A detachable bone drill for vertebral body shaping according to claim 1, characterized in that, The limiting member (3) is a screw, and the inner peripheral wall of the first limiting hole (12) is at least partially provided with internal threads.

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